"empty efforts" is a correct and usable phrase in written English.
It can be used to describe efforts that are ineffective, pointless, or without substance. Example: Despite her empty efforts, she could not convince him to change his mind about their relationship.
Without meaningful political actions, this was an empty effort.
Perhaps no issue has symbolized their disappointment or galvanized popular anger as much as the sluggish — some say empty — effort to punish those who attacked the protesters.
This could just be an empty effort whose real purposes is to collect e-mail addresses from party members to hit them up for donations.
In theatre listings filled with revivals or adaptations of movies or novels, this half-empty effort should encourage more producers to look to original work.
Most of the small guesthouses are empty; despite nascent efforts to promote the islands' rich biodiversity, tourism has yet to take off.
The curators have taken him at his word, editing out his more gimmicky efforts, emptying out the museum and turning it into a spare, unhurried tour of his art.
It's an elastic clause, given that it's hard to see the future, and could be used to shut down efforts to empty the camp.
But on December 5th, in a further blow to efforts to empty the camp, a federal appeals court ruled that detainees have the right to challenge the value of such "assurances" before being expelled.
Advocates for residents' and tenants' rights have long claimed that people in rent-regulated apartments owned by the Pinnacle Group were widely intimidated as part of the owner's efforts to empty its buildings to make way for higher-paying tenants.
I mean, sure, Liam Payne gave into the industry's zest for thirst trap photos and Louis Tomlinson showcased his new relationship with Danielle Campbell, but without new music, their efforts seemed empty.
